I have for sale a hamilton 175 watt retrofit single ended assembly it includes two reflectors two used 20k bulbs about 6 months use and a hamilton ballast all for sale for $60 I bought this about a month ago from another socalireefs member tested it and then put it on the shelf when I decided that it was not big enough for my tank my loss is your gain $60 cash located in Corona eightscaleracer@yahoo.com this is a single 1x175 watt ballast not a dual I will drop down to $50 need to get rid of